138328085 has 32 divisors (see below), whose sum is σ = 193881600. Its totient is φ = 92793600.

The previous prime is 138328067. The next prime is 138328087. The reversal of 138328085 is 580823831.

It is not a de Polignac number, because 138328085 - 2⁸ = 138327829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138328087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 385136 + ... + 385494.

It is an arithmetic number, because the mean of its divisors is an integer number (6058800).

Almost surely, 2^138328085 is an apocalyptic number.

It is an amenable number.

138328085 is a deficient number, since it is larger than the sum of its proper divisors (55553515).

138328085 is a wasteful number, since it uses less digits than its factorization.

138328085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 138328085 is about 11761.2960595336. The cubic root of 138328085 is about 517.1741248477.

The spelling of 138328085 in words is "one hundred thirty-eight million, three hundred twenty-eight thousand, eighty-five".